The Dome of the Rock (Arabic: مسجد قبة الصخرة, translit.: Masjid Qubbat As-Sakhrah, Hebrew: כיפת הסלע, translit.: Kipat Hasela) is an important Islamic mosque and Jerusalem landmark located on the Temple Mount in the Old City of Jerusalem. The structure, the oldest extant example of early Islamic architecture, was completed in 691 CE at the order of Arabian Umayyad Caliph, Abd al-Malik. The site's significance stems from religious traditions regarding the rock, known as the Foundation Stone, at its heart.